نتایج جستجو برای: gray scale sonography
تعداد نتایج: 619752 فیلتر نتایج به سال:
OBJECTIVE This study was designed to determine whether hypnosis can modulate color perception. Such evidence would provide insight into the nature of hypnosis and its underlying mechanisms. METHOD Eight highly hypnotizable subjects were asked to see a color pattern in color, a similar gray-scale pattern in color, the color pattern as gray scale, and the gray-scale pattern as gray scale during...
The problem of optimal mapping of multi-level gray scale images to a coarser gray scale is formulated and explored. A distance between images having different intensity ranges is introduced. Minimization of such a distance can be viewed as least squares approximation of a source high range image by the best target image with a given number of levels of gray. Following S.Lloyd [1], we proved tha...
OBJECTIVE The purpose of this series is to describe the prenatal diagnosis and pregnancy outcome of fetuses affected with Dandy-Walker malformation in which a posterior cyst herniated through a bony defect of the occipital skull, foramen magnum, or both. METHODS Two- and 3-dimensional sonography were used to examine 2 fetuses with poorly delineated cerebellar structures and a large posterior ...
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